Invisible Jinx Ult

Every time I use Jinx's R, the rocket is invisible to me, but visible to everyone else. EVERY SINGLE TIME. It's completely unplayable: I can hardly tell my ult triggered, and I can only tell hit or miss by if they go boom, and I can't get a better idea of speed of rocket, timing, etc., because I can't see the rocket at all. It's bad enough that I'm not playing Jinx again until after it's fixed. After all, essentially not having your R is a huge drawback. I always play on summoner's rift, normal games (except for one URF, that was the first game I saw this bug), but since it happens EVERY time I ult, I can't give you any more specific details on possible confounding interactions.